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Siemens 3RT2626-1BB45 — Contactors

Siemens 3RT2626-1BB45 SIRIUS Capacitor Contactor, 24 VDC Coi

MPN3RT2626-1BB45
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Siemens SIRIUS capacitor contactor, Size S0, 24 V DC coil with screw terminals, 45 mm width, rated 6 A at 24 V DC.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2626-1BB45 — Identification
ParameterValue
Contactor frame sizeS0
3RT2626-1BB45 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2626-1BB45 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability0.00000001
3RT2626-1BB45 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2626-1BB45 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
3RT2626-1BB45 — Durability
ParameterValue
Durability with aux. switch block (cycles, typ.)3 000 000
3RT2626-1BB45 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2626-1BB45 — Mechanical
ParameterValue
Width45 mm
Height135 mm
Depth165 mm

Product details

It carries a 24 V DC coil with screw-type terminals, and its switching capacity is rated at 6 A at 24 V DC, 6 A at 230 V AC, and 3 A at 400 V AC — the DC ratings are what matter for this coil variant, since the contactor itself is built for AC capacitor loads on the main poles.

The S0 frame (45 mm wide, 135 mm high, 165 mm deep) is a standard Siemens contactor footprint — it snaps onto 35 mm DIN rail per DIN EN 50022, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward, so panel layout is flexible. The 24 V DC coil holds at nominal and drops out below 18 V; verify your control supply can deliver the inrush without sagging. Wire termination accepts solid conductors from 0.5 mm² up to 4 mm² (2x per terminal) and stranded from 1 mm² to 10 mm², with a single 10 mm² at 40 °C or dual 10 mm² at 60 °C — this covers most panel wiring for capacitor banks up to the contactor's rating. The switching frequency is capped at 100 operations per hour across all voltage ranges (230 V to 690 V), which is typical for capacitor switching where thermal recovery time governs.

The S0 width (45 mm) leaves room for adjacent contactors or overload relays in a multi-step PFC bank. The screw terminals are captive and accept the wire ranges listed — no special tools beyond a standard screwdriver. The DC coil means no hum, and the arcing time of 10 ms is typical for DC switching; ensure the control transformer or power supply can handle the coil's pick-up current.

Frequently asked questions

Where can I buy the 3RT2626-1BB45 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is the closest functional second-source for the 3RT2626-1BB45?

The 3RT2326-1BK80 is the closest peer — same S0 frame and capacitor contactor class, but verify the coil voltage differs (the 1BB45 is 24 V DC; the 1BK80 may be a different coil variant). Panel footprint and wiring are identical.

What is the depth of the 3RT2626-1BB45?

The depth is 165 mm, with a width of 45 mm and height of 135 mm — standard S0 frame dimensions for DIN-rail mounting.

What solid wire sizes does the 3RT2626-1BB45 accept?

It accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² solid conductors per terminal.

Will the 3RT2626-1BB45 drop into a panel specified for the 3RT2326-1BK80 without rewiring?

Yes — same S0 frame, same DIN-rail footprint, same terminal layout. The only difference is the coil voltage; if the panel's control voltage matches 24 V DC, it's a direct swap. If the 1BK80 had a different coil voltage, you'll need to verify the control circuit.

MPN
3RT2626-1BB45